1996 Jeep Cherokee runs wide open

JUSTICE1

MEMBER
1996 JEEP CHEROKEE

Engine Mechanical problem
1996 Jeep Cherokee 6 cyl Four Wheel Drive Automatic

I put a 1998 motor in a 1996 jeep grand cherokee used all 1996 parts but when you go to start it it will run wide open even unhooked linkages it will also back fire but you can't let run because it would blow up. How do you reset the computer. My brother was mudding when he throw a rod throught the block so he had to have the rpms way up. Can you help got me puzzled. Thanks john

3 Replies

BLACKOP555

MECHANIC
10,371 POSTS

Theres a rod through the block? It wouldnt eeven run if thats the case. What seems to be the problem.

Vehicle running full open? If thats teh case take the air intake off of the throttle body and check to make sure the butterfly valve in the throttle body is closed.

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Tuesday, June 22nd, 2010 AT 11:47 AM

JUSTICE1

MEMBER
2 POSTS

The throttle plate is closed I think the 1998 head might not be the same as 1996 because I think I have a intake leak can't same to get to seal any advise
thanks justice

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Wednesday, June 23rd, 2010 AT 9:16 AM

BLACKOP555

MECHANIC
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You may want to take that off and check it. How high is the rpm of your engine?

If you want to reset your computer by the way you can disconnect it for 10 mins then hook it back up

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Wednesday, June 23rd, 2010 AT 11:24 AM